This is a qualitative study with the aim to analyze the participation of vulnerable populations in scientific health care research. The study was carried out in Americaninhas, Novo Oriente de Minas, Minas Gerais, Brazil, with nine volunteers enrolled in the clinical trial of a hookworm infection vaccine developed by an international research institution. The data was collected using semi-structured interviews after testing the vaccine and analyzed using Bardin's Content Analysis method. Most volunteers decided to participate in the study motivated by the possibility of receiving access to health care services. We conclude that the decision to participate was influenced by the socio-economic and psychosocial vulnerability of the population and how they symbolically construct this vulnerability. The study points out the need to prepare the community in order to participate in the study through an education translated into action, considering the need for developing autonomy among the participating subjects
Research in health; Vulnerable population; Personal autonomy